TheLastRipper
TheLastRipper can save Last.fm streams to mp3's, while downloading album cover, appending ID3v2 tags and organizing you music after Artist/Album/Track. TheLastRipper will also help you generate playlists from the data available from you Last.fm account. TheLastRipper requires a Last.fm login, you can regsiter for free at http://last.fm/
Please note that recordings of radio streams, may NOT be legal, we recommend that you investegate your local laws, before using TheLastRipper.
Features
* Recording Last.fm streams to mp3's
* Organize your music in directories: Artist/Album/Track/
* Downloads coverart
* Appends ID3v2 tags
* Generates playlist
o M3U
o SMIL
o PlS
* Support proxy settings
REQUIREMENTS
Mac OS X 10.3 or later and Mono 1.2.3 ( ftp://www.go-mono.com/archive/1.2.6/macos-10-universal/4/MonoFramework-1.2.6_4.macos10.novell.universal.dmg )
Tags: music , rip , audio , ripper , lastfm , stream



2 Opinions:
geira, yes that's possible. you can use iscrobbler or the normal lastfm client for this.
Recording works find, but is it possible to listen to stream simultaneously?